Possible loosening solder in my G4?

I've been having a lot of trouble with startup and waking from sleep on an iBook G4 I have. Four months ago, the original hard drive in the computer refused to mount and died, and during that time I'd been getting a lot of kernel panic screens, so I thought the hard drive had just been failing. With a new hard drive now, I was devastated to see that same terrifying screen during a boot the day after my self-performed computer hardware transplant, one of which I took pride in.
However, I believe I may have diagnosed the problem. After perusing the internet for information on common iBook problems, I found that many people were having kernel panic screens upon startup and waking from sleep when the computer wasn't "warmed up". The reason for this was a faulty solder on the internal RAM, or some other component. I've found consistency in the screens, too. The computer only panics upon startup and waking from sleep, and this always happens when in a cold environment, especially outside or in a cold classroom. In my house, the computer has absolutely no problems upon startup. Could I possibly have one of these faulty solder joints on an internal component?

Because hard drives connected to ATA and SATA controller cards should be bootable, the cards must contain a Mac ROM, which makes them firmware-based. Cards that require drivers are driver-based, but because the driver is written on the hard drive, it's read after the hard drive has begun the startup sequence. A driver-based controller card wouldn't be useful, because its driver could never be read before the card and connected drive(s) are recognized.

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    >
    <IfModule mod_weblogic.c>
    WebLogicCluster 127.0.0.1:7005,127.0.0.1:7007,127.0.0.1:7003,127.0.0.1:7103,127.0.0.1:7104
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    <IfModule mod_weblogic.c>
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    http://download.oracle.com/docs/cd/E11035_01/wls100/plugins/apache.html
    http://httpd.apache.org/docs/2.0/mod/core.html#location

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